Mechanism for watermarking paper while in a damp condition.



W. 0- NASH.

KING PAPER WHILE IN A DAMP CONDITION. APPLICATION FILED J'ULYZ4. I915.

I MECHANISM FOR WATERMAR Patented Dec. 28, 1915.

INVENTOR. Willi 311 EN 21 51 310% A Time/v5 Y COLUMBIA PLANOORAPH C0,. WASHINGTON, D. C.

WILLIAM o. NASH, or ivinivAsire, WISCONSIN.

MECHANISM FOR WATERMABKING PAPER WHILE IN A DAMP CONDITION.

Application filed July 24., 1915. Serial No. 41,668.

To all whom it may concern:

Be it known that I, WILLIAM C. NASH, a citizen of the United States, residing at Menasha, (post-oflice Neenah,) in the county of Winnebago and State of Wisconsin, have invented a new and useful Mechanism for Watermarking Paper lVhile in a Damp Condition, of which the following is a specification.

My invention relates to automatically stamping or impressing upon paper at any convenient point in the length of a paper making machine where the paper is in a suitable moist condition, with a die made from wood, hard rubber or metal,,said die bein oaeratedb means of com ressed air 5 so arranged that the degree of pressure given to the die may be increased-ordiminished according to the thickness and degree of moisture of the paper to be operated upon. I am aware of the manner of water marking paper by means of awire covered roll which is brought intocontact. with a sheet of paper and produces a displacementof paper stock and showing the usual water mark, and also by means of an elastic type upon a revolving hub, such as was patented by E. R. and O. F. Behrens May 10, 1904:, Re-issueNo. 12,218, and of a device patented by Edward Ilich, May 7, 1907, No. 852,788, for impressing dry paper by means of type arranged around a roll between which and a hard surfaced roll the paper is fed, neither of-which devices do I claim.

My invention consists of a revolving smooth faced cylinder about ten' inches in diameter and eight inches face, the rim of which is formed of thin brass, andas this cylinder contains a plurality of smaller cylinders, in order to prevent confusion in the use of the term cylinder, this first named one will hereafter be called a drum and the smaller ones cylinders.

My invention is shown in the ing drawing, in which,

Figure 1 is an elevation transversely of a paper making machine, showing its side accompanyframes, a roll mounted for revolution thereon, and above it, a shafthaving apluralityl ofprinting drums mounted thereon. Fig. 2 is an end elevation. of one of said printing drums, one of its cylinders being in section and also a part of its rim. Fig. 3 is section partially of said drum, taken parallel with the shaft upon which it is mounted. Fig. 4

Specification of Letters Patent.

is asection transversely of said shaft at a point within the hub of the drum. Fig. 5 is a plan of the face of a mark that is adapted to be used with said printing drum. Fig. 6 is an end view of the type block that is used with said drum, and line of the curve of the surface of the roll with which the type is adapted to be used. Fig. 7 is an end elevation of amodified form of journal box for the upper shaft in Fig. 1. Fig. 8 is a section of the same on the line a, a, of Fig. 7. Fig. 1 is drawn upon a small scale, Figs. 2, 3 and 4:, upon a larger one, Figs. 5 and 6 upon a still larger-one and Figs. 7 and 8 about half that of Figs. 2, 3 and 4.

Similar numerals indicate like parts in the several views.

1', indicates the side frames of a paper making machine; 2, a, hard smooth faced roll, which as before remarked may be located at any point in the length of the machine where the moisture in the paper 'is suflicient for the type to make a clear impression. This roll is mounted upon the shaft 3 and may be formed of any material that will present a hard smooth surface, and be revolved in the direction of the arrow thereon in Fig. 1, by means of its gear wheel 4, from any available source of power.

Above the roll a tubular shaft 5 is mounted in a stationary position, and arranged lengthwise of the shaft are a plurality of printing drums 6. These drums each consists of a hub 7, having arms 8, upon the outer ends of which a thin rim 9 is secured, as with screws 10, and forming a smooth faced cylinder, or drum. The rim is provided with perforations 11, through which the printing type of the mark are to be projected. The drums are each provided with a plurality of cylinders 12, for receiving the expanding element, of which compressed air is preferable. Three cylinders are shown, but no special number is claimed. Thecylinders are radially arranged around thebore of the hub of the drum and each one is providedwith a piston 13, a square piston rod 14:, and a cylinder head 15, which is secured to the open end of the cylinder with bolts or screws 16, and through which head the piston rod is fitted to slide easily. Upon the outer end of each rod .1 1, a type receiving block 17, is secured with a pin 18. Dovetailed into the block 17, is a type block l9,'having the desired letters or design for forming the trade or water mark. The type block may be secured in the dove-tailed type spondingfwith the curve as near as is practicable, with the curve of the face of the roll 2. This inward curved face in the type is not essential ordinarily, a fiat faced type printing satisfactorilyunless the roll 2, is very small in diameter, but the face must be of such form,.whatever it may be, that it will make an even impression across the type block in order to produce a satisfactory water mark. This is shown in Fig.6, the line 2, representing the curve of said roll. The printing'drums are loosely mounted upon the tubular shaft 5, and are to be revolved by frictional contact with the sheet of paper which is fed in between the roll 2 and drums. The drums are spaced apart upon the shaft and'upon a inch paper machine, there may be siX or more of the drums. They are held in position lengthwise of the shaft by means of collars 22, having set screws 28. The ends of the hubs 7, are rabbeted upon their outer surface and the bore of the collars correspondingly rabb'eted for fitting the hub and forming a joint as near air tight as possible. The

drums 6 are shown in Fig. 1 as being in the same position circumferentially of the shaft relative to the perforations 11, but'which will not be likely to occur in practice and is not desirable, for the reason that the pres,- sure of the operating element, be it air or steam, will be more uniform if their action The degree n is not all at the same instant. of pressure to be given to the type against the sheet of paper can be governed by means of hand screws, as 26. The tubular shaft 5 is provided with shallow grooves 27 and 28, with a space 29 between the grooves, and a small opening 30, through the part 29 into the bore of the shaft. These grooves extend to a point outside of the collars. The groove 28, is the one into which the compressed air or steam is exhausted when the drum is being revolved in the direction of the arrow in Fig. 4, and the groove 27 then serves to receive any leakage of air or steam that may take place between the 'hub and shaft. Should occasion require the chang ing of the shaft end for end, the groove 27 would then become the normal exhaust retually used in the several cylinders instead I vof air, although its use would not be .de-

sirable on account of the steam and heat ing element as within wtheyscope of my 1n- Compressed air is provided for vention. operating the several type piston rods by meanseof pump32, which may be located at and be driven from any convenient point, l

it being shownin the, present case'upon the base of the machine 1 name and is provided with a pulley 33, whichmay be driven from a pulleyt l upon the shaft 3. A pipe'35, connects the pump and shaft 5, and is provided'with a cock36, for controlling the. flowofair. e

The pipe 35 should be provided with a union, as 50, for the easy and quick chang-v ing of the shaftfi for another havinga "dif ferent set of watermark type. The several shafts Sshould be provided with marks and onelof the supporting boxes for the shaft stant for producing a clear and perfect water niark."1The action of the stamping [with a corresponding mark 'asX in Fig. 7, j

mechanism. is to force the type of the desired mark outward through the openings 11, theinstant the perforation .31 in the cylinder arrives at the perforation 30', in the pipe. As thef distance .from the open ing 30 to the groove :28 isvery short, it follows that immediately after the outward movement of a piston red the opening 30 will arrive. at the grow e28, and the exaround each piston -rod and as soonas the pressure is removed bythe action of exhausting, thepiston will return to the inward limit'of its movement. 1

A form of box for the support-of the shaft 5 is shownin Figs. 7' and 8, which is intended to be used in place of the support shown in Fig.1. 7 It consists of a stand 88,

vhaust will occur.I A spring 37, is arranged adapted to be bolted to the lower section of the machine frame 1 in place ofthe upper section 189 with bolts 40, ithaving a box 4L1 arranged toslide in "a vertical direction in the clove-tail 4-2 of the stand. A hand screw 43 is threaded into the arm-44. and is provided with a set collar 45, between which and the box 41 a spring 46 is arranged for pressing downward upon the box. The bon is provided with. a capdfT, which ishinged to the box at 48, and can be. secured closed by means of a pivotal bolt 4-9. Withthis box and cap and the arrangement forthe vertical adjustmentof said boxes and the coiled spring 46, the shaft 5 with a supply of printing drums thereon,' c'an be placed in position and adjusted vertically, quicklf and accurately', e Although the device is best adapted and is described as applicable only to'moist paper where it is intended to generally be used, it may be used on a frame separate from a paper making machine,and upon dry and finished stock, but necessarily, will require greater-force to beapplied for making the impression with possibly inferior results.

- Having described my invention, what I claim and desire to secure by Letters Patent, is,

1. A tubular perforated shaft around which a drum is revoluble, said drum having a cylinder and -a piston therein for being acted upon by means of an expansive element" deliverable from said shaft, a groove in the shaft along itssurface longitudinally thereof into which said expansive element can exhaust after its action upon the piston within said cylinder.

2. A drum having a bore adapted to be mounted upon a shaft for revolution, means for preventing its movement longitudinally of the shaft, a cylinder within the drum having its axis radially arranged from the bore of the drum and a closed end adjacent said bore, a piston in said cylinder, a cylinder head secured over the open endof the cylinder, a piston rod extending from the piston through the cylinder head, a perforation through the closed end of the cylinder from its interior to the bore of the drum, a tubular shaft mounted in a fixed position upon which said drum is mountedand is adapted to be filled with an expanslve element, a shallow groove along the outs1de surface of the shaft, a perforation into the shaft adjacent said groove through the full circumferential portion of the shaft upon that side of the groove upon which the perforation into the cylinder approaches said groove in the revolutions of the drum, and a spring arranged around the piston rod between the piston and cylinder head for returning the piston to the inward limit of its movement after the exhausting of said expansive element through the perforation into said groove.

3. A hard smooth faced roll mounted for revolution upon a suitable frame, a tubular shaft mounted in a fixed position above said roll, a source of an expansive element provided and in communication with said tubular shaft, means for controlling the degree of pressure of said element Within the shaft, one or more printing drums mounted loosely upon said shaft, means for securing each drum from movement longitudinally of the shaft, a smooth faced rim around each drum, one or more perforations having the greatest length arranged axially thereof through the face of each drum, one or more cylinders adapted for recelvlng an expansive element arranged radially Within each drum, a piston in each cylinder, a cylinder head secured'oven the open end of each cyl- I for beingdetachably connected with said type holder and having a printing surface of such form as will produce an even impression of the letters of the mark across the type adapted to be projected through a perforation in the face of the drum and be engaged with a sheet of paper being fed in between said smooth faced roll and type drums, a perforation through the shell of said tubular shaft and into each cylinder for admitting an expansive element thereto and for its exhausting therefrom as each drum is revolved, and a spring around each piston rod between the piston and cylinder head for returning the piston to the inward limit of its movement after each exhaust action.

at. In a device for automatically forming an impression upon paper, a printing drum consisting of a hub adapted to be mounted upon a tubular shaft, a plurality of arms extending from said hub, a thin rim secured upon the outer ends of said arms and forming a cylindrical smooth faced surface around the drum, one or more perforations through the rim having its greatest dimension in the direction of its axial line, one or more cylinders adapted for receiving an expansive element arranged radially within the drum, a piston in each cylinder, a cylinder head secured over the open end of each cylinder, a piston rod having an angular cross section connected with each piston and extending outside of the cylinder and through the head, a type holder secured upon the outer end of each piston rod, a trade or water mark type having its lettered face of such form as will produce an impression of the letters of the mark across the type secured to said type holder and adapted to be projected through one of the aforesaid rim perforations, a tubular shaft upon which said drum is adapted to be loosely mounted and secured from longitudinal movement, means for admitting an expansive element thereto and for its regulation relative to its force, suitable ports for the admission of said expansive element to each cylinder and for its being exhausted therefrom, and a spring around each piston rod between the piston and cylinder head for returning the piston to the inward limit of its movement.

5. In a device for automatically forming an impression upon paper, a printing drum consisting of a hub adapted to be mounted upon a tubular shaft, a plurality of arms extending from said hub a thin rim secured 1 at:

upon the outer ends of said arms and forming a cylindrical smooth faced surface around the drum, one or more perforations through the rimhaving its greatest dimension in the direction of its axial line, one or more cylinders adapted for receiving compressed air arranged radially Within the drum,- ,a piston in each cylinder, a cylinder head secured over the open end of each cylinder, a piston rod having an angular cross section connected With each piston and extending outside of the cylinder and through the head, a type holder secured upon the outer end of each pistonrod, a trade or Water mark type having its lettered face of such form as will produce an even impression of the letters of the mark across the type secured to said 'type'holder and adaptof said air to each cylinder from said shaft and for its being exhausted therefrom, and a spring around each piston rod between the piston and cylinder head for returning the piston to the inward limit of its movement. 3o

- WILLIAM C. NASH. Witnesses n C. M. ALBEE, i J O l-IN RAYYOME.

;Cop1es of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. i i 

